1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae1251f5e15513aab54aed99585f3526867ac86152e56fc3ba44414a3fe6582. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00e89bbf-8e74-4939-9b1f-a15796bf867e.json and https://artists.proofprofile.net/proofs/artist/00e89bbf-8e74-4939-9b1f-a15796bf867e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe965c75df8c494b8615d8e04a0ab4760ae1f78956cdf02e0c87d38414f563fb1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02077087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7cca75afc6936e8ef56ee6bdad457dbe888b0c71ff420f7104f5d9428fdff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM72200871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b4feaed34784b6fffa7f0e4bc6fdc21c1c558418225fe01be8f3248d87e2df. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02277653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe684fc55f33ee8d77d6fbaaacc8e572598da61a44d4d5525c364e0cea307dae2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02277687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd5ae3e721c60406b05cb586c344d54719560c379a89c85f6b0d0f57a74c1be. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02277690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b4feaed34784b6fffa7f0e4bc6fdc21c1c558418225fe01be8f3248d87e2df. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02277653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c899de9876d9710a45747774ab86ac5c27701830ed3dfc081279e48b15900a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02377021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f24e4b20f37716d4becf8924caca14f7d17d285f8a864b372145a7ee8b0b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02377076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf56a7cca394285389cbe3706fcc59ca46eda5521c11168755dab890b0b7adb1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYQ62023119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddd12998bdcae7f0fd824a7919abd959688ad43a13e452c98099d30e2f43fda. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECE72303513.
Fliegerlied (Heut Is So Ein Schöner Tag)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9639b63294ed3484a0798696ff2d3f5e8db26e8def96cd96d52be76f6eae2e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECE72401737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6bebbf0966c81434d9d3e2e305818f5c69d4d10585461780d723f64af50eb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02477109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115f5f67723ce073ee6c1f343872aaeb2f437db0ca049743d70b156e2139d869. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82509772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15acdb41b50ddf702026df22929c1396c7f8126e0d2ca08ca3b05be979ba6fa2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATEK02177350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a930fb9062b1c3541b521238b7689dd39e8f67eaf04277d58d4d70c103048. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2251449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2909b8a8c3253fcc7dbcc12e5eafb631034c3ebf4298f43a6a2dcbbf36b778. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2351419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf56a7cca394285389cbe3706fcc59ca46eda5521c11168755dab890b0b7adb1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYQ62023119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde014a590baff7b950c5a91aeb2eab7ba8a638e090449b937f3c7bd797276ce0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA622401788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e1bea674acf6e9f6f852d6a05bcb42363e6fb91dbc3a158fb72b0637833b97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATY522300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e68c7447946531c908b5486d88a17202bbcbfde50931e81cb7d9bb5e7c5b7. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATY522300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204685358455d686cbbd25ea628d1e081ebb2c76a9d804cd93492f3a10ba45b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECE72402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204685358455d686cbbd25ea628d1e081ebb2c76a9d804cd93492f3a10ba45b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECE72402372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c4e61863b870b5908e503770b74b81fb0411bcf11af01353b111fa4925032. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2550094.